when i google for any specific post from my blog through key words, when i click the link, a google ad shows on top, below the post title. i have noticed that for a quite a few times. but, i have not added any google ad element to my blog. wondering why does wordpress let google do it?
To support the service we may occasionally show Google text ads on your blog, however we do this very rarely. In the future you’ll be able to purchase an upgrade to either turn the ads off or show your own ads and make money from your blog.